Employee Retirement and Profit Sharing Plans - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Unrecognized prior service costs, before tax	$ 2,200	$ 2,600
Unrecognized prior service costs, net of tax	1,700	1,600
Unrecognized actuarial losses, before tax	128,200	122,100
Unrecognized actuarial losses, net of tax	96,300	74,400
Prior service costs expected to be recognized next fiscal year	400
Prior service costs expected to be recognized next fiscal year, net of tax	300
Actuarial losses expected to be recognized next fiscal year	9,800
Actuarial losses expected to be recognized next fiscal year, net of tax	7,200
Noncurrent defined benefit pension plan liability	14,100
Current accrued pension liability	800
Accumulated benefit obligation for all defined benefit plans	$ 311,700	346,000
Frozen defined benefit plan obligations (as a percent)	90.00%
Minimum
Defined Benefit Plan Disclosure [Line Items]
Plan participants' contributions allowed (as a percent)	1.00%
Plans in green zone (more than) (as a percent)	80.00%
Maximum
Defined Benefit Plan Disclosure [Line Items]
Plan participants' contributions allowed (as a percent)	50.00%
Plans in red zone (less than) (as a percent)	65.00%
Plans in yellow zone (less than) (as a percent)	80.00%
De-risking strategy in 2014 | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Targets investment in equity securities, fixed income, cash equivalents and other investments (as a percent)	29.00%
De-risking strategy in 2014 | Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Targets investment in equity securities, fixed income, cash equivalents and other investments (as a percent)	70.00%
De-risking strategy in 2014 | Other Investments
Defined Benefit Plan Disclosure [Line Items]
Targets investment in equity securities, fixed income, cash equivalents and other investments (as a percent)	1.00%
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Funded status at end of year	$ (14,890)	$ (5,024)